package com.atguigu.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnume;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberRespVo;
import com.atguigu.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.auth.feign.ThirdPartFeignService;
import com.atguigu.gulimall.auth.vo.UserLoginVo;
import com.atguigu.gulimall.auth.vo.UserRegistVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

import static com.atguigu.common.constant.AuthServerConstant.LOGIN_USER;

/**
 * 2022/3/23 12:09 星期三
 * LoginController
 * Created by ASIA 乔帅阳 .
 * --
 * --
 */

@Controller
public class LoginController {



    @Autowired
    private ThirdPartFeignService thirdPartFeignService;

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Resource
    private MemberFeignService memberFeignService;
    /**
     *
     * 发送一个请求直接跳转到一个页面
     * springMVC viewcontroller:将请求和页面映射过来，  就不用写下面那么多空方法了
     * @return
     */

    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);

        //如果用户没登录那就跳转到登录页面
        if (attribute == null) {
            return "login";
        } else {
            return "redirect:http://qsy.sale:82";
        }

    }

    @GetMapping("/reg.html")
    public String regPage(){

        return "reg";
    }


    @ResponseBody
    @RequestMapping("/sms/sendcode")
    public R senCode(@RequestParam("phone")String phone){
        //TODO 1、接口防刷
        String redisCode = stringRedisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if(!StringUtils.isEmpty(redisCode)){
            long l = Long.parseLong(redisCode.split("_")[1]);
            if(System.currentTimeMillis() - l < 60000){
                //60s内不能再发
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(),BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }
        //2、验证码再次校验。 redis。存key -手机号  value-验证码即code
       /* String code = UUID.randomUUID().toString().substring(0, 5);*/
        int intcode = 0;
        for (int i = 0; i <= 100; i++) {
            intcode = new Random().nextInt(999999);
            if (intcode < 100000) {
                intcode += 100000;
            }
        }
        String code  = intcode+"_"+System.currentTimeMillis();
        //redis缓存验证码 5分钟有效，防止同一个手机号在60秒内再次发送验证码。
        stringRedisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,code,5, TimeUnit.MINUTES);

        thirdPartFeignService.sendCode(phone, String.valueOf(intcode));

        return R.ok();
    }



    /**
     *
     * TODO: 重定向携带数据：利用session原理，将数据放在session中。
     * TODO:只要跳转到下一个页面取出这个数据以后，session里面的数据就会删掉
     * TODO：分布下session问题
     * RedirectAttributes：重定向也可以保留数据，不会丢失
     * 用户注册
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result,
                         RedirectAttributes redirectAttributes,
                         HttpSession session){
         if(result.hasErrors()){
          //   Map<String,String> errors = new HashMap<>();
             Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
             // model.addAttribute("errors",errors);
             redirectAttributes.addFlashAttribute("errors",errors);
             //session.set
             //如果校验出错，转发到注册页
             return "redirect:http://auth.qsy.sale:82/reg.html";
         }
         //真正注册
          //1、校验验证码
        String code = vo.getCode();
        String s = stringRedisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if(!StringUtils.isEmpty(s)){
            if(code.equals(s.split("_")[0])){
                //删除验证码,令牌机制
                stringRedisTemplate.delete(s);
                //验证码通过  //真正注册， 调用远程注册接口
                R r = memberFeignService.regist(vo);
                if(r.getCode()==0){
                    //成功
                    return "redirect:http://auth.qsy.sale:82/login.html";
                }else {
                    Map<String,String> errors = new HashMap<>();
                    errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.qsy.sale:82/reg.html";
                }

            }else{
                //验证码不通过
                Map<String,String> errors = new HashMap<>();
                errors.put("code","验证码错误");
                redirectAttributes.addFlashAttribute("errors",errors);
                return "redirect:http://auth.qsy.sale:82/reg.html";
            }
        }else {
            //验证码不存
            Map<String,String> errors = new HashMap<>();
            errors.put("code","验证码错误");
            redirectAttributes.addFlashAttribute("errors",errors);
            //转发到注册页
            return "redirect:http://auth.qsy.sale:82/reg.html";
        }


    /*    //注册成功回到首页，回到登录页
        return "redirect:/login.html";*/
    }




    @PostMapping("/login")
    public String login(UserLoginVo vo,RedirectAttributes redirectAttributes,HttpSession session){
//RedirectAttributes redirectAttributes  用session原理
        //远程登录
        R login = memberFeignService.login(vo);
        if(login.getCode()==0){
            //成功
            MemberRespVo data = login.getData("data", new TypeReference<MemberRespVo>() {});
            session.setAttribute(LOGIN_USER,data);

            return "redirect:http://qsy.sale:82";
        }else {
            Map<String,String> errors = new HashMap<>();
            errors.put("msg",login.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.qsy.sale:82/login.html";
        }

    }



    @GetMapping(value = "/loguot.html")
    public String logout(HttpServletRequest request) {
        request.getSession().removeAttribute(LOGIN_USER);
        request.getSession().invalidate();
        return "redirect:http://qsy.sale:82";
    }


}
